Sorry for not installing the beta before reporting this, but I simply don't have the time — I have about thirty minutes including having to pack up, because I'm leaving for Christmas. But, bug time: If I try to move a folder and there's a folder with the same name in the target, I get this warning that I can merge, but only if so-and-so that isn't actually clear. Being confused about that, I tap abort, but lo and behold, the source folder has now been deleted.
These were files I were adb pushing from my lappie, so no harm done, but bugs of this caliber are kinda... Well, let's say I'm no exactly psyched to continue using Mixplorer rn XD.
Anyway, thanks, and merry Christmas!